EXTSW 1/4” ID x 3/4” OD x 3/4" Thick 304 Stainless Spacer
Hillman 3/4-in I.D. x 1-in O.D. x 1-in Long Seamless Steel Spacers in the Spacers & Machine Bushings department at Lowes.com
EXTSW 3/8" ID x 1 3/4 " OD x 3/8" Thick 316 Stainless Spacer
3/4" ID Rubber Washers 1 1/4" OD X 1/8" Thickness (EDPM Washer/Spacer) | eBay
Black Rubber Washer Large Rubber Washers 1 1/2" OD x 3/4" ID x 3/16" Thickness - NBR Rubber Washers Flat Rubber Washers Round Rubber Washers (10): Amazon.com: Industrial & Scientific
Everbilt 3/8 in. x 1/4 in. Steel Spacers in Chrome (2-Piece/Pack) 800324 - The Home Depot
100 Packs Rubber Flat Washers Heavy Duty Abrasion Resistant 3/4" OD X 1/4" ID X 1/8 Inch Thickness Black Neoprene Industrial Rubber Spacer: Amazon.com: Industrial & Scientific